不同孔形下豆类透筛效果对比及圆筒筛优化

Comparison of bean sieving effects caused by different hole shapes andoptimization of cylinder sieves

以大豆为对象,推导了筛孔透筛区域的面积计算公式,对比了不同孔型圆筒筛的大豆透筛效果,得出大豆在正方形筛孔的圆筒筛中透筛效果最好,并通过仿真计算对其进行了验证。在此基础上对正方形筛孔的圆筒筛进行优化,用筛分比和除杂比计算筛分效果,通过正交仿真试验分析得到不同工艺参数对圆筒筛的豆类筛分效果的影响次序,并得出最佳工艺参数为圆筒倾角5°、圆筒转速16 r/min、进料速度14 t/h、筛孔边长9 mm,该条件下筛分效果为0.935,比原始模型提高了3.89%。

Formula for calculating the area of the sieve openings by took soybeans as the object was derived,and sieving effects of cylinder sieves with different types of holes were also compared.It is concluded that the cylinder sieve with square sieve pores has the best screening effect on soybeans,which has been verified by simulation calculations.Besides,the paper chose the soybean sieve ratio and the impurity remove ratio to calculate the sieving effect.Orthogonal simulation calculations experiments were performed to obtain the influence order of different process parameters on the sieving effect of beans in cylinder sieves and the best process parameters:the tilt angle is 5°,the rotating speed is 16 r/min,the feeding speed is 14 t/h,and the sieve hole side length is 9 mm.Under the conditions,sieving effect increased by 3.89%from the original of 0.935.